Rank	Countries/Territories	Count	Percent
1	United States	159	38.5%
2	China	82	19.9%
3	Germany	60	14.5%
4	France	34	8.2%
5	Japan	27	6.5%
6	Canada	9	2.2%
7	Korea, Republic of	6	1.5%
8	Singapore	5	1.2%
9	United Kingdom	5	1.2%
10	Netherlands	4	1%
11	Malaysia	3	0.7%
12	Iran, Islamic Republic of	2	0.5%
13	Ireland	2	0.5%
14	Italy	2	0.5%
15	Austria	2	0.5%
16	Hong Kong	2	0.5%
17	Cyprus	2	0.5%
18	Thailand	2	0.5%
19	Taiwan	1	0.2%
20	India	1	0.2%
21	Argentina	1	0.2%
22	Australia	1	0.2%
23	Mongolia	1	0.2%